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Atractus bocki WERNER, 1909

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common NamesBock's Ground Snake 
SynonymAtractus bocki WERNER 1909: 228
Atractus canedii SCROCCHI & CEI 1991
Atractus bocki — HALLERMANN 1998
Atractus canedii — LEYNAUD & BUCHER 1999: 15
Atractus canedii — PASSOS et al. 2007
Atractus bocki — WALLACH et al. 2014: 69 
DistributionBolivia (Cochabamba), to NE Argentina (Jujuy and Salta)

Type locality: Cochabamba, Departamento de Cochabamba, Bolivia.

canedii: NW Argentina (Jujuy and Salta); Type locality: Departamento Anta, between Anta and J. V. González, Salta, and San Salvador de Jujuy, Jujuy, Argentina. Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
 
Reproductionoviparous 
TypesHolotype: ZMH
Holotype: FML 1082 [canedii] 
CommentAmaral 1929 [06317] (cited in PETERS & OREJAS-MIRANDA 1970) indicated that this was a synonym of A. modestus from Ecuador. See also PASSOS et al. (2007).

Diagnosis.—Atractus bocki is distinguished from all congeners by the following combination of characters: (1) 17/17/17 smooth dorsal scale rows; (2) one or two postoculars; (3) moderate loreal; (4) temporal 1 + 1 or 1 + 2; (5) six or seven supralabials, third and fourth contacting orbit; (6) seven infralabials, first four contacting chinshields; (7) seven maxillary teeth; (8) three gular scale rows; (9) four preventrals; (10) 164– 169 ventrals in females, 161–167 in males; (11) 39–48 subcaudals in females, 45–51 in males; (12) dorsal ground color cream with black bands alternating on flanks, generally connected to opposite one at vertebral area; (13) venter predominantly black with anterior margins of each scale cream; (14) moderate body size, females reaching 341 mm SVL, males 299 mm SVL; (15) long tail in females (16.7–20.8% SVL), males (21.0–22.1% SVL); (16) hemipenis moderately bilobed [from Passos et al. 2009]. 
Etymologynamed after C. Bock, the collector of the type. 
References
  • Amaral, A. do 1930. Estudos sobre ophidios neotropicos XVII. Valor systematico de varias formas de ophidios neotropicos. Mem. Inst. Butantan 4: 1-68 [1929] - get paper here
  • Cacciali, P.; Villalba, R. & Yanosky, A.A. 2007. A NEW SPECIES OF ATRACTUS (SERPENTES:COLUBRIDAE: DIPSADINAE) FROM THE ATLANTIC FOREST OF ALTO PARANÁ, PARAGUAY. South American J. Herp. 2 (2): 83-88 - get paper here
  • Fernandes,R. 1995. Variation and taxonomy of Atractus reticulatus complex (Serpentes: Colubridae). Comun. Mus. Cienc. Tecnol. PUCRS, Sér. Zool. 8: 37-53
  • Hallermann, J. 1998. Annotated catalogue of the type specimens of the herpetological collection in the Zoological Museum of the University of Hamburg. Mitt. hamb. zool. Mus. Inst 95: 197-223.
  • Leynaud, Gerardo C. and Enrique H. Bucher 1999. La fauna de serpientes del Chaco Sudamericano: diversidad, distribución geografica y estado de conservación. Academia Nacional de Ciencias Miscelanea (98):1-46
  • Passos, P., R. Fernandes and Borges-Nojosa, D.M. 2007. A New Species of Atractus (Serpentes: Dipsadinae) from a Relictual Forest in Northeastern Brazil. Copeia 2007 (4): 788–797 - get paper here
  • Passos, P., R. Fernandes and N. Zanella 2005. A new species of Atractus (Serpentes: Colubridae) from Southern Brazil. Herpetologica 61 (2): 209-218 - get paper here
  • Passos, Paulo, Diego F. Cisneros-Heredia and David Salazar-V. 2007. Rediscovery and redescription of the rare Andean snake, Atractus modestus. The Herpetological Journal 17 (1):1-6 - get paper here
  • PASSOS, PAULO; RODRIGO AGUAYO AND GUSTAVO SCROCCHI 2009. Rediscovery of the Rare Atractus bocki, with Assessment of the Taxonomic Status of Atractus canedii (Serpentes: Colubridae: Dipsadinae). Journal of Herpetology 43 (4): 710–715 - get paper here
  • Scrocchi G J. CEI J M. 1991. A new species of the genus Atractus from the northwestern Argentina (Serpentes, Colubridae). Boll. Mus. Reg. Sci. Nat. Torino 9 (1): 205-208.
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. Taylor and Francis, CRC Press, 1237 pp.
  • Werner,F. 1909. Über neue oder seltene Reptilien des Naturhistorischen Museums in Hamburg. Jahrb. Hamb. wiss. Anst. suppl. 2 (Mitt. Naturhist. Mus. Hamb. 1908) 26: 205-247 - get paper here
 
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